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- /*
- * Storage Device.
- */
- typedef struct SDev SDev;
- typedef struct SDifc SDifc;
- typedef struct SDpart SDpart;
- typedef struct SDperm SDperm;
- typedef struct SDreq SDreq;
- typedef struct SDunit SDunit;
- struct SDperm {
- char* name;
- char* user;
- ulong perm;
- };
- struct SDpart {
- ulong start;
- ulong end;
- SDperm;
- int valid;
- ulong vers;
- };
- struct SDunit {
- SDev* dev;
- int subno;
- uchar inquiry[256]; /* format follows SCSI spec */
- SDperm;
- QLock ctl;
- ulong sectors;
- ulong secsize;
- SDpart* part; /* nil or array of size npart */
- int npart;
- ulong vers;
- SDperm ctlperm;
- QLock raw; /* raw read or write in progress */
- ulong rawinuse; /* really just a test-and-set */
- int state;
- SDreq* req;
- SDperm rawperm;
- };
- /*
- * Each controller is represented by a SDev.
- * Each controller is responsible for allocating its unit structures.
- * Each controller has at least one unit.
- */
- struct SDev {
- Ref r; /* Number of callers using device */
- SDifc* ifc; /* pnp/legacy */
- void* ctlr;
- int idno;
- char* name;
- SDev* next;
- QLock; /* enable/disable */
- int enabled;
- int nunit; /* Number of units */
- QLock unitlock; /* `Loading' of units */
- int* unitflg; /* Unit flags */
- SDunit**unit;
- };
- struct SDifc {
- char* name;
- SDev* (*pnp)(void);
- SDev* (*legacy)(int, int);
- SDev* (*id)(SDev*);
- int (*enable)(SDev*);
- int (*disable)(SDev*);
- int (*verify)(SDunit*);
- int (*online)(SDunit*);
- int (*rio)(SDreq*);
- int (*rctl)(SDunit*, char*, int);
- int (*wctl)(SDunit*, Cmdbuf*);
- long (*bio)(SDunit*, int, int, void*, long, long);
- SDev* (*probe)(DevConf*);
- void (*clear)(SDev*);
- char* (*stat)(SDev*, char*, char*);
- };
- struct SDreq {
- SDunit* unit;
- int lun;
- int write;
- uchar cmd[16];
- int clen;
- void* data;
- int dlen;
- int flags;
- int status;
- long rlen;
- uchar sense[256];
- };
- enum {
- SDnosense = 0x00000001,
- SDvalidsense = 0x00010000,
- };
- enum {
- SDretry = -5, /* internal to controllers */
- SDmalloc = -4,
- SDeio = -3,
- SDtimeout = -2,
- SDnostatus = -1,
- SDok = 0,
- SDcheck = 0x02, /* check condition */
- SDbusy = 0x08, /* busy */
- SDmaxio = 2048*1024,
- SDnpart = 16,
- };
- #define sdmalloc(n) malloc(n)
- #define sdfree(p) free(p)
- /* sdscsi.c */
- extern int scsiverify(SDunit*);
- extern int scsionline(SDunit*);
- extern long scsibio(SDunit*, int, int, void*, long, long);
- extern SDev* scsiid(SDev*, SDifc*);
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